Channel reinforcing structure

Abstract

The present application suppresses the vibration of the floor tunnel when a load is input to the vehicle by improving the rigidity of the floor tunnel with this reinforcement, so that abnormal noise is not generated in the vehicle interior. The configuration of the tunnel reinforcement structure (10) has: a floor cross member (15a) extending in the vehicle width direction and linking a floor tunnel (13) provided with an exhaust pipe in a tunnel opening to the outside of the vehicle with lower side members (12a) on both sides of the vehicle; a seat bracket (for example, seat bracket 16c) disposed in front and back of the vehicle in the vehicle front-rear direction and engaged with the floor tunnel (13); and a first tunnel reinforcement member (17) arranged in the tunnel in the vehicle width direction with the floor cross member (15a).

Description

Technical Field

[0001] This invention relates to a channel reinforcement structure that prevents floor channel vibration due to input loads from vehicles. Background Technology

[0002] Conventionally, floor passageways have been constructed in ways such as those described in Patent Document 1. In this construction, compared to floor passageways that connect to the floor panel, the rigidity of the lower longitudinal beams that connect to the vehicle sides of the floor panel is set higher, and rigidity adjustment holes are provided on the front and rear walls of the seat brackets on the lower longitudinal beam side, thereby maintaining dynamic performance during driving while reducing vehicle weight.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-87814 Summary of the Invention

[0006] However, the structure described in Patent Document 1 has the following problem: when the rigidity of the floor passage is low, the floor passage may deform due to vehicle collisions, etc. When driving, the vibration input through the exhaust pipe and shaft components arranged in the passage will cause the floor passage to vibrate, resulting in abnormal noise inside the vehicle.

[0007] The present invention was made in view of this situation, and its object is to provide a channel reinforcement structure that, by increasing the rigidity of the floor channel, can suppress the vibration of the floor channel when a load is applied to the vehicle, so that no abnormal noise is generated inside the vehicle.

[0008] To achieve the above objectives, the channel reinforcement structure of the present invention is characterized by having: a floor channel extending in a longitudinal direction and opening to the lower exterior side of the vehicle; an exhaust pipe or axle component disposed inside the floor channel; a lower longitudinal beam extending in a longitudinal direction outside the vehicle width direction; a floor panel disposed between the floor channel and the lower longitudinal beam; a floor crossbeam extending in the vehicle width direction above the floor panel and connecting the floor channel and the lower longitudinal beam; a seat bracket disposed in front of and behind the floor crossbeam and engaging with the floor channel; a first channel reinforcement member arranged in the vehicle width direction inside the floor channel and the floor crossbeam; a floor frame extending in a longitudinal direction to the lower exterior side of the floor panel; and a connecting bracket disposed in the vehicle width direction inside the floor channel and connecting the exhaust pipe or axle component, wherein the seat bracket is connected to the floor frame via the floor panel and to the connecting bracket via the floor channel.

[0009] Invention Effects

[0010] In this invention, a channel reinforcement structure can be obtained, which, by increasing the rigidity of the floor channel, can suppress the vibration of the floor channel when a load is applied to the vehicle, so that no abnormal noise is generated inside the vehicle. Attached Figure Description

[0011] Figure 1 This is a perspective view showing the channel reinforcement structure on the floor panel inside the vehicle according to this embodiment.

[0012] Figure 2 It is a three-dimensional diagram showing the channel reinforcement structure on the floor panel.

[0013] Figure 3 This is a top view showing the intersection of the beams and the floor frame.

[0014] Figure 4 yes Figure 3 Sectional view IV-IV.

[0015] Figure 5 This is a perspective view showing the truss section of the upper and lower components of the first channel reinforcement member within the floor channel.

[0016] Figure 6 yes Figure 3 The floor passage shown is a VI-VI sectional view.

[0017] Figure 7 This indicates viewing from the front side to the diagonally rear side. Figure 6 A perspective view of the connecting bracket structure as seen in the cross-section of the floor passage.

[0018] Explanation of reference numerals in the attached figures

[0019] 10-channel reinforced structure

[0020] 11 Floor Panels

[0021] 12a, 12b lower longitudinal beams

[0022] 13 Floor Passage

[0023] 13a sidewall

[0024] 13b top

[0025] 14a, 14b floor frames

[0026] 15a, 15b floor beams

[0027] 16a~16d seat brackets

[0028] 16c3 connector

[0029] 16C4 main body

[0030] 16C5 mating flange

[0031] 17. Channel 1 Reinforcing Component

[0032] 17a upper component

[0033] 17b lower component

[0034] 17t1 and 17t2 truss sections

[0035] 17c Connector

[0036] 18 connecting brackets

[0037] 18a partition

[0038] 19 Second Channel Reinforcement Component Detailed Implementation

[0039] <Structure of the Implementation Method>

[0040] Reference Figures 1 to 7 The embodiments of the present invention will be described in detail below. In this description, the same reference numerals are used to refer to the same elements, and repeated descriptions are omitted. Furthermore, in each figure, "front and back" indicated by arrows represents the front-to-back direction of the vehicle (not shown), "left and right" represents the width direction of the vehicle, and "up and down" represents the vertical direction.

[0041] Figure 1 It is a three-dimensional diagram showing the reinforced structure of the passageway on the floor panel inside the vehicle.

[0042] Figure 1 The passageway reinforcement structure 10 shown has a floor panel 11 installed inside the vehicle, lower longitudinal beams 12a and 12b, a floor passageway 13, and floor frames 14a and 14b (see reference). Figure 3 Floor crossbeams (also called beams) 15a and 15b, and multiple seat brackets 16a, 16b, 16c, and 16d. However, each seat bracket 16a to 16d is positioned symmetrically on the left and right sides of the floor passage 13, hence the reference numerals are only marked on the left side in the vehicle width direction. The description will focus on the seat brackets 16a to 16d and the crossbeam 15a on the left side in the vehicle width direction.

[0043] The lower longitudinal beams 12a and 12b extend along the vehicle's front-to-back direction (also known as the front-to-back direction) and engage with the outer edge of the floor panel 11 in the vehicle width direction.

[0044] The floor passage 13 extends longitudinally between the lower longitudinal beams 12a and 12b on both sides of the vehicle. Furthermore, the floor passage 13, with its opening towards the lower exterior side (outdoor side) of the vehicle, engages with the inner edge of the floor panel 11 in the vehicle width direction. The opening of the passage outside the vehicle is referred to as the passage interior. Figure 2As shown, the floor passage 13 has a first passage reinforcement member 17 parallel to the crossbeam 15a extending in the vehicle width direction and extending in the vehicle width direction on the upper surface side within the passage. Furthermore, the floor passage 13 has a connecting bracket 18 extending in the vehicle width direction within the passage. The connecting bracket 18 allows an exhaust pipe (see reference 17) extending in the front-rear direction within the passage to pass through. Figure 7 (or shaft components are connected to the sidewalls within the channel and held therein.)

[0045] Figure 1 The floor beams 15a and 15b shown extend along the vehicle width direction, connecting the lower longitudinal beams 12a and 12b to the floor passage 13 respectively. Figure 2 As shown, the left-side crossbeam 15a has a hollow cross-section (closed section) with the floor panel 11 as its bottom surface. Longitudinal flanges 15a1 and 15a2, bent to the left and right (corresponding to the front and rear of the vehicle) at the ends of the closed section of the crossbeam 15a, are joined to the inner side of the lower longitudinal beam 12a by welding or the like. Furthermore, a flange 15a3 extending from the upper surface of the closed section end of the crossbeam 15a in the vehicle width direction joins the upper surface of the floor passage 13. At the other end of the crossbeam 15a, the longitudinal flange at the closed section end joins the inner side of the lower longitudinal beam 12a facing the vehicle width direction.

[0046] Floor frames 14a and 14b are provided between the seat brackets 16a and 16b on the side of the lower longitudinal beam 12a and the seat brackets 16c and 16d on the side of the floor passage 13, as described below. That is, floor frames 14a and 14b are arranged parallel to each other in the lower outer side of the floor panel 11 between these two sides, extending in the longitudinal direction of the vehicle. In other words, taking one side as an example, floor frame 14a is disposed below the floor panel 11 located in the vehicle width direction, away from the seat brackets 16a and 16b and the seat brackets 16c and 16d.

[0047] Seat brackets 16a to 16d are components that mount and support seats (not shown) for occupants to sit on, and are located on the front and rear sides of crossbeams 15a and 15b in the vehicle longitudinal direction.

[0048] like Figure 2 As shown, the seat brackets 16c and 16d on the floor passage 13 side have main body portions 16c4 and 16b4, which have a hollow cross-section formed with the floor panel 11 as the bottom surface and are located in the front-rear direction along the crossbeam 15a. In the representative seat bracket 16c, a longitudinal flange 16c1, which bends from the closed section end of the main body portion 16c4 to the left and right (front and rear of the vehicle), engages with the side surface 13a on the outer side of the floor passage 13 in the vehicle width direction. Furthermore, a flange 16c2, which extends from the upper part of the closed section end of the main body portion 16c4 in the vehicle width direction, engages with the upper surface of the floor passage 13 via the second passage reinforcement member 19.

[0049] Seat bracket 16c engages with connecting bracket 18 via side wall 13a within the passageway, connecting bracket 18 engaging with the passageway of floor passageway 13 and connecting to exhaust pipe. Figure 7 ) or shaft components. Moreover, such as Figure 3 As shown, the seat bracket 16c is connected via the floor panel 11 to the floor frame 14a, which extends in the front-to-back direction on the lower outdoor side of the floor panel 11.

[0050] The seat bracket 16c has a connecting flange 16c5 extending in three directions from the lower end of the main body 16c4 along the upper surface of the floor panel 11. That is, it has connecting flanges 16c5, 16c5 extending from the main body 16a4 in the front-rear direction and connecting flange 16c5 extending outward in the vehicle width direction. Moreover, the connecting flange 16c5 extending rearward from the main body 16c4 extends toward the crossbeam 15a and serves as a connecting part 16c3.

[0051] The connecting portion 16c3 is connected to a flange 15a2 that bends from the lower end of the crossbeam 15a toward the upper surface of the floor panel 11 and extends along the vehicle width direction. That is, the floor panel 11, the connecting portion 16a3 of the seat bracket 16a, and the flange 15a2 of the crossbeam 15a are welded (joined) at these three points. Furthermore, the connecting portion 16c3 has a plurality of reinforcing ribs extending in the vehicle's longitudinal direction and arranged at predetermined intervals along the vehicle width direction. These reinforcing ribs improve the rigidity of the connecting portion 16c3.

[0052] like Figure 3 As enclosed by the dashed box 30, the floor frame 14a extends in a manner that intersects with the crossbeam 15a, and at this intersection, it is welded (joined) to the crossbeam 15a via the floor panel 11. In detail, the flanges 14a1 on both sides of the floor frame 14a in the vehicle width direction and the flanges 15a2 on both sides of the crossbeam 15a in the vehicle front-rear direction are joined to the floor panel 11. By welding the floor frame 14a to the crossbeam 15a in this way, the load input to the floor frame 14a can be efficiently transferred to the crossbeam 15a.

[0053] like Figure 2As shown, in the floor passage 13, second passage reinforcement members 19 extending along the long side of the passage (vehicle longitudinal direction) are joined at the corners on both sides of the upper outer surface. The floor passage 13 is sandwiched between the inner sides of these second passage reinforcement members 19, and a connecting bracket 18 is joined within this passage. By joining the second passage reinforcement members 19 at the corners on both sides of the upper outer surface extending along the long side of the passage, the rigidity of the floor passage 13 is improved. The connecting bracket 18 is then joined within the floor passage 13 inside the second passage reinforcement members 19, which have improved rigidity, thereby increasing the connection strength of the connecting bracket 18.

[0054] Figure 4 yes Figure 3 Sectional view IV-IV, see reference Figure 4 The cross-sectional structure of the first channel reinforcing member 17 in the vehicle width direction will be explained here. Figure 4 As shown, a first channel reinforcement member 17 is provided in the channel of the floor channel 13 located between the left crossbeam 15a and the right crossbeam 15b in the vehicle width direction.

[0055] The first channel reinforcement member 17 has an upper member 17a and a lower member 17b disposed within the channel. The upper member 17a is disposed on the upper side relative to the middle position in the channel height direction, and on the upper side, a closed section is formed that closes the cavity in the channel along the vehicle width direction.

[0056] The lower component 17b has a pair of truss portions 17t1 and 17t2 in a truss shape (described later) on the lower side of the upper component 17a. These portions are symmetrically formed on the left and right sides, separated by an imaginary longitudinal line passing vertically through the middle of the vehicle width direction of the aforementioned closed section. The pair of truss portions 17t1 and 17t2 are connected by a connecting portion 17c extending laterally (horizontally). The connecting portion 17c is formed along the lower surface of the upper component 17a.

[0057] The truss shape is formed by a first longitudinal side 17b1 extending longitudinally and connecting to the sidewall 13a inside the passage, an upper transverse side 17b2 extending laterally above the first longitudinal side 17b1, an inclined side 17b3 extending upwardly from the lower end of the first longitudinal side 17b1 toward the right end of the connecting portion 17c, and a second longitudinal side 17b4 connecting the upper end of the inclined side 17b3 to the right end of the upper transverse side 17b2 longitudinally. The second longitudinal side 17b4 is shorter than the first longitudinal side 17b1.

[0058] Thus, the first channel reinforcement member 17 is divided into an upper member 17a and a lower member 17b, thereby enabling the upper member 17a to share the load input to the upper side of the floor channel 13 and the lower member 17b to share the load input to the lower side, thereby providing support.

[0059] Furthermore, as indicated by arrow Y1, loads input from the right-side crossbeam 15b to the lower side of the sidewall of the floor passage 13 are transmitted to the connecting portion 17c via the rising inclined edge 17b3 of one truss section 17t2. This transmitted load is further transmitted, as indicated by arrow Y2, via the connecting portion 17c to the other truss section 17t1, and via the descending inclined edge 17b3 to the left-side crossbeam 15a. At this time, the load transmitted from the connecting portion 17c is supported by the descending inclined edge 17b3 of the truss section 17t1, and therefore can be supported by the lower component 17b in a manner that does not cause the floor passage 13 to tip over.

[0060] like Figure 5 As shown, the truss sections 17t1 and 17t2 have inclined surfaces 7t1 and 7t2 extending a predetermined length from their respective inclined edges 17b3 toward the front of the vehicle. The inclined surfaces 7t1 and 7t2 extend to the left and right sides in the vehicle width direction and connect with the floor panel 11 (see reference). Figure 2 The first joint portions t1a and t2a are joined to the lower surface of the floor passage 13. Each inclined surface 7t1 and 7t2 is connected by a connecting portion 17c. Furthermore, as shown by truss portion 17t1, the truss portion 17t1 facing the rear of the vehicle has a second joint portion t1b that bends in the vehicle width direction and joins the inner side of the side wall 13a of the floor passage 13.

[0061] According to this structure, taking one of the truss sections 17t1 and 17t2 as an example, the first joint t1a of the truss section 17t1 is joined to the lower surface of the floor panel 11, and the second joint t1b is joined to the side wall 13a of the floor passage 13, thus increasing the rigidity of the floor passage 13. Furthermore, the input load to the floor passage 13 can be transmitted to the lower surface of the floor panel 11 via the first joint t1a, and to the side wall 13a of the floor passage 13 via the second joint t1b. That is, the input load to the floor passage 13 can be distributed and released to both the floor panel 11 and the floor passage 13.

[0062] Figure 6 yes Figure 3 The floor passage 13 shown is a VI-VI sectional view. Figure 7 This indicates an observation from the front side to the diagonally rear side. Figure 6 The structure of the connecting bracket 18 is shown in the cross-section of the floor channel 13. The connecting bracket 18 is sandwiched between the inner side of the second channel reinforcement member 19 and the channel of the floor channel 13.

[0063] like Figure 6As shown, the connecting bracket 18 disposed in the passage has a partition 18a that connects to the side wall 13a and top 13b of the floor passage 13 and encloses the passage along the vehicle width direction. Figure 7 As shown, the L-shaped rod member 21, which collides laterally with the partition 18a towards the rear of the vehicle, is a component that hooks the exhaust pipe 22 or the shaft member to suspend it. The connecting bracket 18 has a partition 18a that connects to the side wall 13a and the top 13b within the passage, thereby increasing the rigidity of the floor passage 13.

[0064] <Effects of the Implementation Method>

[0065] Next, the features and effects of the channel reinforcement structure of this embodiment described above will be explained.

[0066] (1) The passageway reinforcement structure 10 has: a floor passageway 13 extending in the front-rear direction and opening to the lower exterior side of the vehicle; an exhaust pipe or shaft component disposed inside the floor passageway 13; a lower longitudinal beam 12a extending in the front-rear direction outside the vehicle width direction; a floor panel 11 disposed between the floor passageway 13 and the lower longitudinal beam 12a; a crossbeam 15a extending in the vehicle width direction above the floor panel 11 and connecting the floor passageway 13 and the lower longitudinal beam 12a; and a seat bracket (e.g., seat bracket 16c) disposed in front of and behind the crossbeam 15a and engaging with the floor passageway 13.

[0067] Furthermore, the passage reinforcement structure 10 includes: a first passage reinforcement member 17 arranged in the vehicle width direction with the crossbeam 15a inside the floor passage 13; a floor frame 14a extending in the front-rear direction on the lower outdoor side of the floor panel 11; and a connecting bracket 18 disposed in the vehicle width direction inside the floor passage 13 and connecting the exhaust pipe or shaft member, wherein the seat bracket 16c is connected to the floor frame 14a via the floor panel 11 and to the connecting bracket 18 via the floor passage 13.

[0068] According to this configuration, the connecting bracket 18, which connects to the exhaust pipe, is connected to the seat bracket 16c, which is connected to the floor frame 14a, via the side 13a of the floor passage 13. This allows the load input from the connecting bracket 18 to the floor passage 13 to be transferred to the highly rigid seat bracket 16c. This transfer suppresses vibrations input from the side 13a of the exhaust pipe to the floor passage 13. Therefore, vibrations and abnormal noises input into the vehicle interior can be reduced.

[0069] (2) The seat bracket 16c has: a main body 16c4 with the floor panel 11 as the bottom surface forming a hollow cross section; and a connecting part 16c3 connected to the crossbeam 15a, the connecting part 16c3 being formed such that a connecting flange 16c5 extending from the lower end of the main body 16c4 along the floor panel 11 is connected to the crossbeam 15a.

[0070] According to this configuration, the engaging flange 16c5 of the seat bracket 16c extends in a planar shape and connects (engages) with the crossbeam 15a as a connecting portion 16c3. Therefore, the load input to the seat bracket 16c can be efficiently transferred to the crossbeam 15a, and the rigidity between the seat bracket 16c and the crossbeam 15a can be improved. Therefore, the vibration of the connecting bracket 18 can be further suppressed.

[0071] Because the connecting portion 16c3 is planar, it can mitigate and suppress three-dimensional loads from various directions, such as side impacts and torsion of the vehicle body. This suppression can prevent breakage and separation of the connection between the seat bracket 16c and the crossbeam 15a. Furthermore, if the seat bracket 16c is connected to the crossbeam 15a through a closed section, it is susceptible to three-dimensional torsion and separation, thus becoming unable to transfer loads.

[0072] (3) The floor frame 14a extends in a manner that intersects with the beam 15a, and is welded to the beam 15a via the floor panel 11 at the intersection.

[0073] According to this configuration, by welding the intersection of the floor frame 14a and the crossbeam 15a, the load input to the seat bracket 16c can be efficiently transferred from the floor frame 14a to the crossbeam 15a. Therefore, the load transmitted to the floor channel 13 to which the seat bracket 16c is joined can be suppressed, thereby further suppressing the vibration of the connecting bracket that connects to the exhaust pipe disposed within the channel. Additionally, the rigidity between the seat bracket 16c and the crossbeam 15a can be improved.

[0074] (4) It has a second channel reinforcement member 19, which engages with the corner of the upper outer surface of the floor channel 13 and extends along the long side of the floor channel 13. The connecting bracket 18 is engaged with the second channel reinforcement member 19 via the floor channel 13.

[0075] According to this configuration, a second channel reinforcement member 19 is joined at the corners of both sides of the upper outer surface extending along the long side of the floor channel 13, thereby increasing the rigidity of the floor channel 13. The floor channel 13 is sandwiched inside the second channel reinforcement member 19, which has increased rigidity, and the connecting bracket 18 is joined within such a channel, thereby increasing the joint strength of the connecting bracket 18. Therefore, the input load for the seat bracket 16c can be transmitted from the corners of the floor channel 13, which is reinforced by the second channel reinforcement member 19 joined to the outer surface, to the connecting bracket 18, thus suppressing the vibration of the side 13a of the floor channel 13 and also suppressing the vibration of the connecting bracket 18.

[0076] (5) The first channel reinforcement member 17 has: an upper member 17a, which is disposed on the upper side of the floor channel 13 in the interior of the floor channel 13, relative to the middle position in the height direction of the floor channel 13, and has a shape that forms a closed cross section together with the floor channel 13; and a lower member 17b, which is disposed on the lower side of the upper member 17a, and has a shape that rises and slopes upward from below the side wall 13a of the floor channel 13 toward the middle of the vehicle width.

[0077] According to this configuration, the first channel reinforcement member 17 is divided into an upper member 17a and a lower member 17b, thereby enabling the load input to the upper side of the floor channel 13 and the load input to the lower side to be supported separately. Further, left and right crossbeams 15a and 15b in the vehicle width direction are joined to both sides of the floor channel 13, enabling the transfer of load input from one crossbeam 15a via the upper member 17a to the other crossbeam 15b. During this transfer, the lower member 17b supports the pouring of the floor channel 13.

[0078] This is because the lower component 17b has a shape that slopes upwards from below the exterior side wall 13a of the floor passage 13 toward the middle of the vehicle width; in other words, it has a shape that slopes downwards from the middle of the vehicle width of the floor passage 13 toward one of the exterior side walls 13a. Therefore, the lower component 17b can support the load transmitted from the other side wall, preventing it from tipping over. This increases the rigidity of the floor passage 13, thus suppressing vibrations input from the exhaust pipe (not shown).

[0079] (6) The lower component 17b has: a pair of truss-shaped truss portions 17t1 and 17t2 that obliquely connect the side walls of the floor passage 13 on both sides in the vehicle width direction to the upper component 17a in the interior of the floor passage 13; and connecting portions 16a3 and 16b3 that connect the pair of truss portions 17t1 and 17t2 to each other. The connecting portions 16a3 and 16b3 are arranged along the lower surface of the upper component 17a.

[0080] According to this configuration, the truss sections 17t1 and 17t2 on both sides of the passage are connected by the connecting section 17c, thereby enabling the load input from below the side wall 13a of the floor passage 13 to be transferred. Figure 4 As indicated by arrows Y1 and Y2, the load is transmitted from one truss section 17t1 to the other truss section 17t2 via the connecting section 17c. Therefore, the rigidity of the floor passage 13 can be improved, and deformation such as vibration and spillage of the floor passage 13 can be suppressed.

[0081] (7) Truss sections 17t1 and 17t2 have a first joint t1a that engages with the lower surface of the floor panel 11 and a second joint t1b that engages with the side wall 13a of the floor passage 13.

[0082] According to this configuration, the truss portions 17t1 and 17t2 of the lower component 17b are joined to the sidewall 13a and floor panel 11 of the floor channel 13, thereby enabling the load transmitted to the floor channel 13 to be transferred to the first channel reinforcement member 17. Therefore, the rigidity of the floor channel 13 can be improved, and the vibration and deformation of the floor channel 13 can be suppressed.

[0083] (8) The connecting bracket 18 has a partition 18a that engages with the sidewall 13a and top 13b of the floor channel 13 and divides the interior of the floor channel 13.

[0084] According to this configuration, the connecting bracket 18 has a partition 18a that engages with the sidewalls 13a and top 13b of the floor channel 13 and divides the interior of the floor channel 13, thereby improving the rigidity of the floor channel 13. Therefore, it can firmly support the load input to the floor channel 13, thus suppressing vibration and deformation of the floor channel 13.

[0085] The above describes the vehicle body structure of this embodiment, but the present invention is not limited thereto and can be appropriately modified without departing from the spirit of the present invention.

Claims

1. A channel reinforcement structure, characterized in that, have: A floor passageway extending in the front-to-back direction and opening to the lower exterior side of the vehicle; An exhaust pipe or shaft component disposed inside the floor passage; A lower longitudinal beam extending along the front-rear direction on the outer side of the vehicle in the width direction; A floor panel is provided between the floor channel and the lower longitudinal beam; A floor crossbeam extending along the vehicle width direction above the floor panel and connecting the floor passage to the lower longitudinal beam; Seat brackets are positioned at the front and rear of the floor beam and engage with the floor passageway; A first channel reinforcement member is arranged inside the floor channel and in the vehicle width direction with the floor beam; A floor frame extending in the front-to-back direction on the lower outdoor side of the floor panel; and A connecting bracket is configured inside the floor passage in the vehicle width direction to connect the exhaust pipe or axle component. The seat bracket is connected to the floor frame via the floor panel and to the connecting bracket via the floor channel. The seat bracket has a main body with the floor panel as the bottom surface, forming a hollow cross-section; and the connection part that connects to the floor beam, The connecting portion extends in such a way that a connecting flange extending from the lower end of the main body along the floor panel is connected to the floor beam.

2. The channel reinforcement structure according to claim 1, characterized in that, The floor frame extends in a manner that intersects with the floor beam, and is welded to the floor beam via the floor panel at the intersection.

3. The channel reinforcement structure according to claim 1, characterized in that, It has a second channel reinforcement member, which engages with the corner of the upper outer surface of the floor channel and extends along the long side of the floor channel. The connecting bracket is connected to the second channel reinforcement member via the floor channel.

4. The channel reinforcement structure according to claim 1, characterized in that, The first channel reinforcement component has: The upper component is disposed on the upper side inside the floor channel, relative to the midpoint of the height direction of the floor channel, and has a shape that forms a closed cross section together with the floor channel; and The lower component is disposed below the upper component and has a shape that slopes upward from below the side wall of the floor passage toward the middle of the vehicle width.

5. The channel reinforcement structure according to claim 4, characterized in that, The lower component includes: a pair of truss-shaped sections inside the floor passage that obliquely connect the side walls on both sides of the floor passage in the vehicle width direction to the upper component; and a connecting section that connects the pair of truss sections to each other. The connecting portion is arranged along the lower surface of the upper component.

6. The channel reinforcement structure according to claim 5, characterized in that, The truss section has: A first joint that engages with the lower surface of the floor panel; and The second joint that engages with the sidewall of the floor channel.

7. The channel reinforcement structure according to claim 1, characterized in that, The connecting bracket has a partition that engages with the sidewalls and top of the floor channel and divides the interior of the floor channel.

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